# How do I safely change all old customernumbers

**URL:** <https://forum.litium.com/t/how-do-i-safely-change-all-old-customernumbers/325>\
**Category:** Questions\
**Tags:** litium-6, accelerator\
**Created:** [October 29, 2018, 2:21pm UTC](https://forum.litium.com/t/how-do-i-safely-change-all-old-customernumbers/325 "2018-10-29T14:21:11Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Cissi](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.litium.com/cissi/32/18_2.png) [@Cissi](https://forum.litium.com/u/Cissi)\
**Post date:** [October 29, 2018, 2:21pm UTC](https://forum.litium.com/t/how-do-i-safely-change-all-old-customernumbers/325/1 "2018-10-29T14:21:11Z")

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I want to change all our old customernumbers who got the prefix. But how do I safely remove them so the orders still got the connection?

Litium version: 6.2.2-patch-1810041453

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**Author:** ![patric.forsgard](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.litium.com/patric.forsgard/32/10_2.png) [@patric.forsgard](https://forum.litium.com/u/patric.forsgard)\
**Post date:** [October 29, 2018, 3:46pm UTC](https://forum.litium.com/t/how-do-i-safely-change-all-old-customernumbers/325/2 "2018-10-29T15:46:07Z")

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Connection between orders and the person that placed the order is related to the person `SystemId` and not the readable `Id`.

In your case I think you can make an update of all the `Person.Id` in the database and then restart all the websites and the information should now be updated.